DQRID : D020701.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/01/1993000011/04/19931900Suspect
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Subject:
SGP/EBBR/E4 - Reprocess: Bad soil heat flux sensor #5
DataStreams:sgp30ebbrE4.b1, sgp15ebbrE4.b1
Description:
On September 1, 1993 the EBBR system at Plevna, E4, was relocated in the
same field.  However, soil contact for soil heat flux plate #5 was not
properly established.  This resulted in somewhat high positive and very
high negative outputs, depending on the direction of soil heat flow.
Corrupted 30 minute values of shf4, c_shf4, g4, ave_shf, h, and e,
and corrupted 15 minute values of mv_hft4 resulted.

The quantities shf4, c_shf4, g4, and mv_hft4 are bad data values and
are not recoverable.  The other quantities can be recalculated using
the four functioning sets of soil sensors. (Note: Soil heat flux 
sensor #4 was also malfunctioning during part of the time period 
identified.  That problem is identified in two separate DQRs.  See
D931108.5 and D020701.2 for the equations to use while sensor #4
was not working properly)

ave_shf = (g1 + g2 + g3 + g4)/4
e = -(q + ave_shf)/(1 + bowen)
h = -(e + ave_shf + q)
Suggestions: 
Recalculate sensible, latent and soil heat fluxes using the equations provided.
Measurements:sgp30ebbrE4.b1:
  • corr_soil_heat_flow_5
  • soil_heat_flow_5
  • latent_heat_flux
  • surface_soil_heat_flux_avg
  • surface_soil_heat_flux_5
  • sensible_heat_flux
more
sgp15ebbrE4.b1:
  • soil_heat_flow_5_mv
more

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